Eigenvalue analysis at each step

dimitra2 · Post by **dimitra2** » Mon May 22, 2006 9:22 am

Hi everyone! I'm quite a new user of Opensees, I'm using it to run some pushover analyses for my diploma thesis. Please!!I need some help!I want to run a force-adaptive pushover analysis, I mean I want to perform eigenvalue analysis at each step of the pushover. How can I program it?

silvia · Post by **silvia** » Mon May 22, 2006 9:47 am

you could set up a loop over the time steps and do analyze 1 at each step and then either before or after type: set lambda [eigen 1] and it gives you the eigenvalue.

dimitra2 · Post by **dimitra2** » Mon May 22, 2006 9:51 am

Thanks a lot!!